The engineer's work is largely edge cases that don't fit into prescriptive code. Ie, that is substantially the system in place: We have a set of things that can

The engineer's work is largely edge cases that don't fit into prescriptive code. Ie, that is substantially the system in place: We have a set of things that can be done without an engineer because they were already designed and approved by a group of engineers, and for everything else it is bespoke engineering.